AN ANGLE WITH A MEASURE OF 90 DEGREES
RIGHT ANGLE
AN ANGLE WHOSE MEASURE IS GREATER THAN 90 DEGREES AND LESS THAN 180 DEGREES
OBTUSE ANGLE
POINTS THAT DO NOT LIE ON THE SAME LINE
NONCOLLINEAR POINTS
AN ANGLE WHOSE MEASURE IS LESS THAN 90 DEGREES
ACUTE ANGLE
MEASURABLE PART OF A LINE THAT CONSISTS OF 2 POINTS, CALLED ENDPOINTS, AND ALL THE POINTS IN BETWEEN THEM
LINE SEGMENT
REASONING THAT USES TRUE STATEMENTS, RULES, DEFINITIONS, OR PROPERTIES TO REACH LOGICAL CONCLUSIONS TAHT ARE ALSO TRUE
DEDUCTIVE REASONING
REASONING THAT USES A NUMBER OF SPECIFIC EXAMPLES AND OBSERVATIONS TO ARRIVE AT A CONJECTURE
INDUCTIVE REASONING
STATEMENT THAT HAS BEEN PROVED
THEOREM
STATEMENT ACCEPTED AS TRUE WITHOUT PROOF
POSTULATE
THE PHRASE IMMEDIATELY FOLLOWING THE WORD "IF" IN A CONDITIONAL STATEMENT
HYPOTHESIS
COPLANER LINES THAT DO NOT INTERSECT
PARALLEL LINES
A LINE THAT INTERSECTS 2 DIFFERENT LINES
TRANSVERSAL
A TRIANGLE THAT HAS 1 90 DEGREE ANGLE
RIGHT TRIANGLE
ANGLES ON OPPOSITE SIDE OF THE TRANSVERSAL AND BETWEEN THE OTHER LINES
ALTERNATE INTERIOR ANGLES
A TRIANGLE WITH EXACTLY 2 CONGRUENT SIDES
ISOSCELES TRIANGLE
QUADRILATERAL WITH EXACTLY 1 PAIR OF PARALLEL OPPOSITE SIDES
TRAPEZOID
ANGLES ON OPPOSITE SIDE OF THE TRANSVERSAL AND OUTSIDE OF THE OTHER LINES
ALTERNATE EXTERIOR ANGLES
QUADRILATERAL WITH 2 PAIRS OF CONGRUENT CONSECUTIVE SIDES AND OPPOSITE SIDES THAT ARE NOT PARALLEL
KITE
THE PHRASE THAT IMMEDIATELY FOLLOWS THE WORD "THEN" IN A CONDITIONAL STATEMENT
CONCLUSION
A TRIANGLE WITH NO CONGRUENT SIDES
SCALENE TRIANGLE
A TRIANGLE WITH 1 OBTUSE ANGLE
OBTUSE TRIANGLE
PARALLELOGRAM WITH 4 CONGRUENT SIDES AND 4 RIGHT ANGLES
SQUARE
PARALLELOGRAM WITH 4 CONGRUENT SIDES
RHOMBUS
A TRIANGLE WITH THREE ACUTE ANGLES
ACUTE TRIANGLE
PARALLELOGRAM WITH 4 RIGHT ANGLES AND 2 PAIRS OF CONGRUENT OPPOSITES
RECTANGLE